27x^2-63.75x+28.875=0

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Solution for 27x^2-63.75x+28.875=0 equation:


Simplifying
27x2 + -63.75x + 28.875 = 0

Reorder the terms:
28.875 + -63.75x + 27x2 = 0

Solving
28.875 + -63.75x + 27x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
27 the coefficient of the squared term: 

Divide each side by '27'.
1.069444444 + -2.361111111x + x2 = 0

Move the constant term to the right:

Add '-1.069444444' to each side of the equation.
1.069444444 + -2.361111111x + -1.069444444 + x2 = 0 + -1.069444444

Reorder the terms:
1.069444444 + -1.069444444 + -2.361111111x + x2 = 0 + -1.069444444

Combine like terms: 1.069444444 + -1.069444444 = 0.000000000
0.000000000 + -2.361111111x + x2 = 0 + -1.069444444
-2.361111111x + x2 = 0 + -1.069444444

Combine like terms: 0 + -1.069444444 = -1.069444444
-2.361111111x + x2 = -1.069444444

The x term is -2.361111111x.  Take half its coefficient (-1.180555556).
Square it (1.393711421) and add it to both sides.

Add '1.393711421' to each side of the equation.
-2.361111111x + 1.393711421 + x2 = -1.069444444 + 1.393711421

Reorder the terms:
1.393711421 + -2.361111111x + x2 = -1.069444444 + 1.393711421

Combine like terms: -1.069444444 + 1.393711421 = 0.324266977
1.393711421 + -2.361111111x + x2 = 0.324266977

Factor a perfect square on the left side:
(x + -1.180555556)(x + -1.180555556) = 0.324266977

Calculate the square root of the right side: 0.569444446

Break this problem into two subproblems by setting 
(x + -1.180555556) equal to 0.569444446 and -0.569444446.

Subproblem 1

x + -1.180555556 = 0.569444446 Simplifying x + -1.180555556 = 0.569444446 Reorder the terms: -1.180555556 + x = 0.569444446 Solving -1.180555556 + x = 0.569444446 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.180555556' to each side of the equation. -1.180555556 + 1.180555556 + x = 0.569444446 + 1.180555556 Combine like terms: -1.180555556 + 1.180555556 = 0.000000000 0.000000000 + x = 0.569444446 + 1.180555556 x = 0.569444446 + 1.180555556 Combine like terms: 0.569444446 + 1.180555556 = 1.750000002 x = 1.750000002 Simplifying x = 1.750000002

Subproblem 2

x + -1.180555556 = -0.569444446 Simplifying x + -1.180555556 = -0.569444446 Reorder the terms: -1.180555556 + x = -0.569444446 Solving -1.180555556 + x = -0.569444446 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.180555556' to each side of the equation. -1.180555556 + 1.180555556 + x = -0.569444446 + 1.180555556 Combine like terms: -1.180555556 + 1.180555556 = 0.000000000 0.000000000 + x = -0.569444446 + 1.180555556 x = -0.569444446 + 1.180555556 Combine like terms: -0.569444446 + 1.180555556 = 0.61111111 x = 0.61111111 Simplifying x = 0.61111111

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.750000002, 0.61111111}

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